Despite the fact that I may come off as being a bit hard a***d in my comments on CC I've actually only had really nice and even incredibly lovely guests during my 3 years of hosting (room in my home)! With only a handful of guests with a slightly annoying habit or other. With most of my guests I have had some kind of messaging conversation to reflect my care and attentiveness on the one hand and on the other hand through their replies allow me to be able to suss them out better.
Even if I've had somebody contact beforehand about having to cancel or not going to book after an inquiry conversation, I always thank them for giving me the heads up and that I understand as well as wishing them a great stay in the city or that they'll be able to visit the city another time and always welcome to book. Even with people that hadn't booked I've gotten lovely reactions back. In the end we are in the hospitality business you have to be generous even if a move was not going in your direction at the moment.
Except for 2 exceptions very early on, I only hosted all-female guests or females with their partner. It's hard to say which one of these was the best experience, because I have about two handfuls of upper-creme-de-la-creme guests.
One has an on-the-side growing Burlesque career and whose performances I've attended a couple of times when she's back in Amsterdam, and whom I share things on FB that make me think of her - think of a hula hoop lighting up when twirled! Or a lovely jung female programmer and travel buff from China in whose blog I ended up in and have an occasional email exchange, and recently even got a post card for Chinese New Year while she was on a trip to Vietnam. Plus others, with whom the contact has dropped off, but whom I'd certainly not hesitate to drop a line to go have a drink if I was in their area!
Along the way I've gotten chocolates, a little bag of special salt from their region, a couple of plastic mini plants as typical social gesture from Taiwan, a card with a fold-together Taiwanees (I think) monkey god, a scent candle, incence sticks, a key fob, a tiny glass of delicious Canadian maple syrop cream...
I've had guests from most parts of Europe, North America, parts of South America, New Zealand, Australia, many Asian countries, Russia, but my 'wildest' guest country was Kazakhstan (city of Astana and a sweetheart of a guest).
I very much love my German guests who have been wonderful and even the young millenials still had proper behavior and respect for property and such ingrained in them. Maybe it's my German background in sync with their's that triggers this, though I doubt that.
It's been great getting more insight into other cultures.